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Патент USA US3096901

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ice
3,096,892
Patented July 9, 1963
1
2
3,096,892
which will be indicated by the character 38, occupies the
AUTOMATIC TAIL GATE RELEASE
George E. Smith, Jr., Moville, Iowa
Filed Aug. 15, 1960, Ser. No. 49,778
1 Claim. (Cl. 214—83.18)
My invention relates to an automatic tail gate release.
An object of my invention is to provide a tail gate hav
ing certain latching features whereby the tail gate will be
position outside of the gate 11 as shown, and in this
position it will be noted that the lower portions 28 of the
hinged structure will bear against this slat ‘38 so that in
this manner when the wagon is ?lled with material, the
gate 11 will be locked against opening, or in other words,
the material can be ?lled into the wagon with the tail gate
being in its closed and locked position.
However, as soon as the endless sprocket chains 36
automatically released when the conveyor at the bottom 10 are started to discharge the material, the slat '38 will pass
of a wagon box is started.
in the direction of the arrow '39‘, whereby the members
A further object of my invention is to provide a release
28 will clear the slat 38 when the tail gate swings in the
which is automatic in that it re-sets itself after it is swung
direction of the arrow 40, which this tail gate will do as
to outer position.
the material is thus conveyed out of the wagon box, since
With these and other objects in view, my invention con 15 the pressure of the material against the tail gate will allow
sists in the construction, arrangement, and combination
it to open.
of the various parts of my device, whereby the objects
The torsion springs 22 are adjusted in such a manner
contemplated are attained as hereinafter more ‘fully set
as to cause the tail gate 11 to swing to the dotted posi
forth, pointed out in my claim, and illustrated in the
accompanying drawings, in which:
tion after discharge of the material, thereby providing
means for locking the lower end of the tail gate regard
FIGURE 1 is a rear View of my device as attached to
less of where the transverse slat 37 may be positioned.
a wagon tail gate, and
The tail gate 11 will swing in the direction 41 after the
FIGURE 2 is a sectional view of FIGURE 1 taken
box is emptied and whereby in swinging in this direction
along the lines 2—2 thereof.
the locking members 28 will pivot until they clear the slat
My invention contemplates the provision of an auto 25 37 and will then occupy the dotted position shown,
matic release for tail gates which functions automatically
whereby when material is again ?lled into the wagon box,
in that no attention is required by the operator since the
the door ‘11 will be in this position, and yet will be locked
device will automatically allow the tail gate to be opened
against outward movement.
and will automatically lock the tail gate in lower locked
By means of this structure the tail gate will be auto
position,
30
matically locked regardless of the position of any of the
I have used the character 10 to designate the side walls
conveying slats 37.
of a wagon, the character 11 indicating the tail gate or
It will now be seen that I have provided the advantages
rear wall, and attached across the tail gate 11 are the
mentioned in the objects of my invention with further
transverse boards 12 and 13.
advantages being readily apparent.
Attached as at .14 to the upper tail gate structure are 35
Some changes may be made in the construction and
the pair of straps 15 which are attached to the cylindrical
arrangement of the parts of my invention without depart
bearings 16, and received within the bearings 16 is the
ing from the real spirit and purpose of my invention,
transverse rod '17, the rod 17 being attached as at 18 to
and it is my intention to cover by my claim any modi?ed
the vertically positioned straps 19, which are attached to
40 forms of structure or use of mechanical equivalents which
the side walls 10‘.
may be reasonably included within their scope.
The character 20 indicates collars attached at 21 to the
I claim as my invention:
transverse rod 17, and the character 22 indicates a pair
A swinging tail gate construction comprising a tail gate,
of torsion springs which are suitably attached at 23 to
means for pivoting the upper edge of said tail gate to a
the rod 17, portions of the torsion springs bearing at 24
wagon, a pair of extending members attached at the lower
45
against the straps 15.
end of said tail gate, an endless conveyor positioned at
Attached at 25 to the transverse board 13 are a pair of
the bottom of said wagon, said conveyor including trans
straps '26 which are hinged at 27 to the further down
verse conveying slats, said extending members including
wardly projecting strap portions 28, the further torsion
straps having lower hinged portions, said lower hinged
springs 29‘ serving to normally maintain engagement of
50 portions adapted to engage any one of said slats to pre
the portions .28 with the board 13.
vent said tail gate from opening outwardly when said con
Attached at '30 (see FIGURE 2) to the lower end of
veyor is stationary, spring urged means attached to said
the tail gate is a resilient strip 31 which bears against
tail gate ‘for positioning said hinged portions behind one
the floor 32 of the wagon box. The character 33 indi
of said slats when said slat is spaced inwardly from the
cates a pair of bearings suitably secured to the bottom
rear of said wagon, the lower edge of said tail gate being
of the wagon box, and journalled in the bearings 33 is a
adapted to clear said slats, a resilient ?ap attached adja
transverse shaft ‘34 to which are attached the pair of
cently to said lower edge and adapted to engage the ?oor
sprockets 35 at either side of the box, the sprockets 35
of said wagon.
engaging the endless sprocket chain 36 to which sprocket
References Cited in the ?le of this patent
chain 36 are attached the usual transverse paddles or slats
37 which as in usual practice are provided for conveying 60
UNITED STATES PATENTS
the material in the wagon rearwardly and outwardly
through the tail gate.
The device operates in the following manner. As
shown in FIGURES '1 and 2, one of the paddles or slats,
2,345,328
2,462,404
2,475,590
2,837,228
Conway et al __________ __ Mar. 28,
Kahres et al ___________ __ ‘Feb. 22,
Carbert ______________ __ July 12,
Kaster ________________ .._ June 3,
1944
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1949
1958
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